Script Loader: Pass startOfWeek setting to @wordpress/date

Allows the block editor to respect the site's Week Starts On setting by defining
`i10n.startOfWeek` when initialising the `@wordpress/date` module.

This is a backport of WordPress/gutenberg#41648.

See #56467.
Props andrewserong.

Built from https://develop.svn.wordpress.org/trunk@54079

wp-includes/script-loader.php

@@ -404,6 +404,7 @@ function wp_default_packages_inline_scripts( $scripts ) {
 							/* translators: %s: Duration. */
 							'past'   => __( '%s ago' ),
 						),
+						'startOfWeek'   => (int) get_option( 'start_of_week', 0 ),
 					),
 					'formats'  => array(
 						/* translators: Time format, see https://www.php.net/manual/datetime.format.php */

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-54078';
+$wp_version = '6.1-alpha-54079';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.